取样方向对兆瓦级风机主轴以铸代锻冲击韧性的影响

本文创新性的采用金属型重力铸造的方法制备兆瓦级风力发电机主轴。为了通过改进铸造工艺来提高风机主轴的力学性能，研究了不同的取样方向、冲击方式以及冲击温度下，兆瓦级风机主轴冲击韧性的差异。结果表明：在不同的取样方向及冲击条件下，主轴的冲击韧性存在显著的差异，且沿金属纤维方向的冲击韧性明显高于其他方向。

Influence of Sampling Directions on Impact Toughness of the MW Wind Turbine Prepared with Casting Instead of Forging Process

The MW wind turbine casting has been prepared by metal mold gravity casting process innovatively in the paper. In order to improve the mechanical properties of the MW wind turbine via modifying the casting technology, the impact toughness of the MW wind turbine was studied under different sampling directions, impacting ways, and shocking temperatures. The results show: that the impact toughness of the MW wind turbine has significant differences under different sampling directions and impacting conditions. Moreover, it is worth mentioning that the impact toughness taken along the direction of metallic fiber is distinctly higher than the ones of other directions.